Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321755936
ISBN 13: 978-0-32175-593-3

Chapter 9 - Inferences Based on Two Samples - Exercises 9.1 - 9.29 - Learning the Mechanics - Page 423: 9.10e

Answer

Fail to reject Null Hypothesis. Hence there is no sufficient evidence that $µ_{1} - µ_{2} \ne 5$

Work Step by Step

$z = \frac{70-50-5}{\sqrt {100/100 + 64/100}}$ $= \frac{15}{1.64} = 9.146$ Since 9.146 > 1.96, we fail to reject Null Hypothesis
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